Why do you need to try Wealthfront?

Wealthfront is an investment service firm based on automation and head quartered at Palo Alto, California. The firm was founded by Andy Rachleff and Dan Carronn in 2008. Adam Nash became CEO and president instead of Andy Rachleff in January 2014. He formerly worked for LinkedIn, eBay and Apple. [1]

So what is Wealthfront and what does it actually do? They provide portfolio management services. When you accept their personalized investment plan recommendation you can open an account and they implement the investments for you. They are based on Modern Portfolio Theory and they give priority to the optimal mix of asset classes over security selection.

There’s a lot of good news here. The first $10,000 in your account is managed for free, and amounts above $10,000 are assessed an annual 0.25% fee. It is possible to get up to $15,000 managed for free since Depei Bao is already a client of their services. All you have to do is click the button at the end of this article.

Wealthfront had the simple philosophy of providing sophisticated financial advice to everyone. Medium and small investors found it too expensive to get this advice. To solve this Wealthfront built what is proving to be a very successful investment service which is already managing over $300 million in client assets. [2] They do it by combining highly sophisticated investment knowledge with well designed software and then distributing it through the internet for everyone to use. By doing this, they not only have reached millions of investors but have also reduced the cost tremendously to get high quality professional advice.

How do they give you advice? Well first and foremost they ask you to make a profile. By looking at your profile, they will understand you as an investor and your attitude towards risk. Your profile will be filled up by important information about your financial assets, your activity in different market conditions and your aims. After examining your profile, after it they’ll provide you with a portfolio that is very well diversified and suited to your needs.

If you haven't tried Wealthfront then signup from the link below and get $15,000 managed for free.

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After you make your plan, you don’t have to implement it straight away. Wealthfront gives you the option of saving the plan first so you can think about it. If you wish to implement your plan, then you have to go through the formal account opening process first. When you open your account and you fund it you can invest in your recommended portfolio immediately. Prior to opening your account or when your portfolio is already invested, you can alter your risk profile and needs, while doing this, your "asset allocation recommendation" adjusts and you can alter your portfolio to your new parameters.

In between the profiling and recommendation procedure you can choose if you want a plan for an individual taxable account or for a 401(k) rollover, traditional, Roth and SEP IRA accounts. Wealthfront selects, for each asset class, the best ETFs (Exchange Traded Funds) for your portfolio with the lowest management fees. [3] They also provide an ongoing asset management service which makes adjustments immediately to bring you back to your recommended mix, when certain factors in your profile will change. Last but not least, Wealthfront provides a continuous tax loss harvesting service. “Tax loss harvesting is a process of selling the worst performing investments to offset capital gains in winning investments.” [4] They do this automatically throughout the year for accounts that are over $100.000 in assets. [5]

To conclude I will say that Wealthfront is the best investment service in the market and you should definitely use it.

Do share your experience of using Wealthfront with us.

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Racer Ranking Problem

Problem

The Problem: A bunch of racers, each one has start time and end time.  Calculate each racer's score based on the following rule:

score = The number of racers who started after and finished earlier than current racer.

Note: There is no duplicated start time or end time.

Implementation (Java)

 

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Similar String

Problem

Similar string is defined as matching by insert/delete/replace one char of any one of string.

Implementation

 

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[Leetcode] zigzag conversion

 

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[LeetCode] Unique Binary Search Trees II, DP Solution

Facts

How many binary tree and binary search tree can be made on n nodes with key values 1, 2, …, n?

  • # of BST - (2n)C(n) /(n+1) -- catalan number
  • # of BT - catalan number * n! = 2n ! / (n+1) !

In BT the layout matters, but the position doesn't. 1-2-3 is same as 2-1-3 if 2 and 1 as roots. In BST, they are different.

Solutions

not so good solution in post: O(2^n) complexity because overlapping sub-trees in the same (start, end) range is not reused.

Two-dimension dp is used (similar to the matrix problem in CLRS). only that the result for each range is a vector

For BT, only one-dimension dp is necessary, i.e., # of nodes

Implementation

 

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A String Problem Using Invert Index

Problem

Given a list of sentences, find two sentences with the maximum common words. e.g.,
This is a good day
This is a bad day
That was good day
You need to return the first and the second sentences because they share four common words.

Implementation

 

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1d and 2d local minimum problem

O(lgn) 1d local minimum implementation

O(lgn) 2d local minimum implementation (downhill)

 

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Server Metrics Design

Problem

Given a server that has requests coming in. Design a data structure such that you can fetch the count of the number requests in the last second, minute and hour.

Implementation

 

 

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tail -f implementation using circular buffer

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DP Solution for Regular Expression Matching

 

 

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