Methodology and Data Sources

Borsa Istanbul data is shown to all visitors with a 15-minute delay in line with Borsa Istanbul licensing rules. Every price card and table shows the data timestamp; "last price" always means the last trade 15 minutes ago. Crypto data from Binance is real time.

Price-dependent ratios such as market cap, P/E and P/B are computed from the delayed price and the annualised figures in the latest KAP financial report. Balance sheet items are processed by the provider the day after the company publishes its report and updated on the site.

AI commentary on stock, fund and market pages is generated by giving large language models only the numeric data shown on the site (price series, ratios, balance sheet items, analyst consensus, settlement data). The model is instructed to stay within the data provided and not to give investment advice; commentary is descriptive and comparative.

Every comment carries the timestamp of the data it was generated from. When the data changes the comment is regenerated; old comments are not shown alongside new data. Commentary is not reviewed by humans, so it may contain errors and should not be the sole basis for a decision.

Stock price forecasts are produced by machine learning models trained separately for each stock. Models take past price series, volume and fundamental ratios as input and output open, high, low and close forecasts for the next trading day. Every forecast is written to the database with the day it was made and the model’s last training date; it is never altered afterwards.

When the day closes, the forecast is compared with the realised price. If the predicted direction (forecast close versus today’s close) matches the realised direction the forecast counts as a hit; mean absolute percentage error measures the size of the miss. Results by model and by stock are reported publicly on the track record page.

The AI fair price is the output of models that compare a company’s multiples and profitability with sector peers; it is not an analyst target and contains no human opinion. The gap between fair price and current price is for information only.

The official price of a mutual fund is computed at day end and usually announced the next day. The live estimate closes this gap by using the fund’s last reported portfolio breakdown: each asset’s portfolio weight is multiplied by that asset’s intraday return, and the sum gives the fund’s estimated daily return. Stocks are valued at 15-minute delayed BIST prices, gold and FX at their market prices.

Coverage is the share of the portfolio for which an intraday price is available. Coverage drops for funds holding foreign stocks, corporate bonds or other unpriced assets; Yatırımcı.AI publishes estimates only for funds with coverage of at least 50% and shows coverage on every row. Once the official price is announced, the gap between estimate and actual is reported on the fund accuracy page.

• Estimated return = Σ (Asset weight × Asset intraday return)
• Coverage = Sum of weights of priced assets
• The estimate is not the official price; no trade executes at it

All data, commentary, forecasts and fair prices on Yatırımcı.AI are for information only; they do not constitute investment advice under CMB regulation and are not a recommendation to buy or sell any security. Investment decisions should be made according to your own risk and return preferences, with advice from authorised institutions where needed.

Delays, gaps and errors originating from data providers are possible. AI outputs are experimental and past accuracy is no guarantee of future results.

When an error is found in data, a definition or a comment, the source data is verified, the provider is notified if the error originates there, and the corrected data is recomputed on the site. Corrections to static content such as the glossary and methodology are published directly; timestamped records such as the forecast history are never changed retroactively, only flagged.

Errors reported by users are reviewed within five business days at most. Cases requiring correction are noted on the relevant page.

For data error reports, methodology questions or content suggestions, use the support channel in the Yatırımcı.AI app or our social media accounts. Corporate data and licensing requests can reach us through the same channels.